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Marovinsky

Producer in Toamasina, Madagascar with commodity Graphite
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Production statistics
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10158957
MAS/MILS ID 7880100008
Record type Site
Current site name Marovinsky
Alternate or previous names Marovintsy

Geographic coordinates

Point of reference Claim
Geographic coordinates: 48.95106, -19.23012 (WGS84)
Elevation 30
Location accuracy 500(meters)

Site location context

Political divisions (FIPS codes)

Toamasina(province)

Madagascar(country)

Africa(continent)

Land(continent)

Federal lands

Federal(land status)

Geographic areas

Country State
Madagascar Toamasina

Commodities

Commodity Importance
Graphite Critical Primary

Materials information

Materials Type of material
Graphite Unknown

Nearby scientific data

Claim (1) 48.95106, -19.23012
ListMap

Economic information

Ore body information

  • Strike N10W
    Dip 25S
    Thickness 20M
    Depth to top 3M
    Field Value
    MAS Matrix # 1
    MAS Column # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 TABULAR
    Type of Orebody #2 LATERITE
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Secondary Ore Control FOLDING
    Degree of Wallrock Alter. UNKNOWN
    Type of Wallrock Alter. #1 UNKNOWN
    Strike And Dip N10W:25S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 3
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 850826
  • Area 1000HA
    Field Value
    Total Surface Area (HA) 1000
    Date of Last Modification 910418

Comments on the geologic information

  • EXACT DIMENSIONS OF OREBODIES ARE NOT KNOWN. PIT WIDTHS VARY FROM ABOUT 30 TO 80 METERS, AND LENGTHS FROM ABOUT 50 TO 100 METERS. REGIONAL STRIKE IS ABOUT N10W WITH DIPS OF 20 TO 30 DEGREES TO THE WEST. WEATHERING HAS LATERIZED THE ROCKS PRODUCING UP TO 30 METERS OF RED CLAY IN WHICH THE GRAPHITE OCCURS AS DISSEMINATED, HIGH-QUALITY, CRYSTALLINE FLAKES. THESE CLAYS CONTAIN FROM 5 TO 15 PERCENT CARBON.

Economic information about the deposit and operations

Operation type Surface
Development status Producer
Commodity type Non-metallic
Significant Yes
Discovery year 1960
Mining method Strip-Hillside
Year of first production 1967
Milling method Flotation

Mining district

District name Manampotsy

Mineral rights holdings

Type of mineral rights Federal Lease

Land status

Ownership category Federal

Ownership information

  • Type Owner-Operator
    Owner Etablissements Gallois
    Interest 100
    Home office Malagasy Rep.
    Year 1983

Production statistics

  • Year 1967
    Description All Production Tonnages Are Calculated. 68140 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 68140mt
  • Year 1968
    Description 70890 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 70890mt
  • Year 1969
    Description 76840 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 76840mt
  • Year 1970
    Description 80200 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 80200mt
  • Year 1971
    Description 83730 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 83730mt
  • Year 1972
    Description 66970 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 66970mt
  • Year 1973
    Description 44600 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 44600mt
  • Year 1974
    Description 53670 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 53670mt
  • Year 1975
    Description 59800 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 59800mt
  • Year 1976
    Description 64530 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 64530mt
  • Year 1977
    Description 67720 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 67720mt
  • Year 1978
    Description 73770 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 73770mt
  • Year 1979
    Description 69940 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 69940mt
  • Year 1980
    Description 60290 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 60290mt
  • Year 1981
    Description 65250 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 65250mt
  • Year 1982
    Description 64780 Mt Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Graphite Graphite 64780mt

Comments on the production information

  • THE RECOVERY SHOWN IS FOR BOTH PRODUCTS COMBINED. GRAPHITE A RECOVERY IS 54% AND GRAPHITE B RECOVERY IS 6%. BOTH PRODUCTS HAVE A GRADE OF 85% CARBON.
  • THE PRODUCTS FROM 7 OF THE 8 GRAPHITE MINES IN MADAGASCAR ARE IDENTICAL. MAROVINTSY, SAHANAVO, SAHAMAMY, FALIARANO, AMBATOMITAMBA, ANTSIRAKAMBO, AND TSARAVONIANY ALL PRODUCE PRODUCTS WITH THE FOLLOWING CHARACTERISTICS: PRODUCT SIZE PERCENT NAME DISTRIBUTION CARBON ----------------------------------------------- LARGE 75% +40 MESH 85 FLAKE 22% -40+60 MESH 3% -60 MESH MEDIUM 25% +40 MESH 85 FLAKE 72% -40+80 MESH 3% -80 MESH FINE 25% +40 MESH 85 FLAKE 50% -40+60 MESH 20% -60+80 MESH 5% -80 MESH EXTRA PASSES 80 MESH 85 FINE (POWDER) ------------------------------------------------- THE PROPORTIONS OF EACH PRODUCT PRODUCED AT EACH MINE ARE SUMMARIZED BELOW: MINE LARGE MEDIUM FINE EXTRA NAME FLAKE FLAKE FLAKE FINE ------------------------------------------------------------ MAROVINTSY 8.5% 21.3% 39.7% 30.5% SAHANAVO 10% 70% ON REQUEST 20% SAHAMAMY 50% LARGE + MEDIUM 43% 7% FALIARANO 10% 40% 40% 10% AMBATOMITAMBA 10% 70% ON REQUEST 20% ANTSIRAKAMBO 20% 50% 20% 10% TSARAAVONIANY 10% 40% 40% 10% ------------------------------------------------------------ THE ANDASIFAHATELO PROPERTY PRODUCES ONLY ONE PRODUCT, A MEDIUM FLAKE HAVING THE SAME SIZE CHARACTERISTICS AS THE MEDIUM FLAKE DESCRIBED IN THE ABOVE TABLES, BUT HAVING A CARBON GRADE OF 92 PERCENT. CAPACITIES GIVEN FOR MAROVINTSY ARE AT 100%, NOT AT THE 1982 PRODUCTION RATE WHICH WAS AT 88.9% OF FULL CAPACITY. OP. COST SHOWN IS ALSO AT FULL CAPACITY.
  • PRODUCTION TONNAGES ARE ESTIMATES BASED ON TOTAL COMPANY PRODUCTION AND ON THE CAPACITIES OF THE 2 MINES OWNED BY GALLOIS.

Comments on the reserve resource information

  • M1C1=M9C4. MINE RECOVERY ESTIMATED AT 95%. DILUTION = 0%. RECOVERABLE RESOURCE = 2,250,580 MT. NO INFERRED RESOURCE DATA ARE AVAILABLE. GRADE IS WEIGHT-PERCENT CARBON.
  • RESERVE CALCULATIONS BASED ON GRAPHITE SECTION FROM GITES DE MINERAUX DE MADAGASCAR, V.1 AND 2,1966. RES. UPDATED TO DEC 1988
  • 4,800 M LENGTH, WIDTH REACHES MAX. OF 400 M. 45 DEGREE DIP. OLD NAME: MAROVINTSY.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method OPEN PIT
    Swell Factor .6
    Avg. Overburden Thickness 3
    Primary Material Cover SAND, SILT
    Percentage 100
    Hardness of Ore SAND, SILT
    Capacity 280
    Capacity Units MT ORE/DAY
    Unit Production Cost 6.88
    Units of Production $/MT ORE
    Operating Days per Year 260
    Operating Shifts per Day 2
    Year of Information 1983

Comments on other economic factors

  • PRODUCTION INCREASES FROM 88.9% TO 100% OF CAPACITY IN 1983. OP. COST SHOWN IS AT FULL CAPACITY, NOT 1982 PROD. RATE.
  • PRODUCTION INCREASES FROM 88.9% TO 100% OF CAPACITY IN 1983. OP. COST SHOWN IS AT FULL CAPACITY, NOT 1982 PROD. RATE.
  • MILL-TO-PORT TRANSPORTATION COST IS $46.77/MT OF PRODUCT. THIS COST INCLUDES $18.17/MT FOR WAREHOUSING. PERSONNEL COSTS ARE INCLUDED IN THE MILL OP. COST. TRANSPORTATION IS BY BARGE.

Reference information

Bibliographic references

  • Deposit

    BESAIRIE, HENRI, "GRAPHITE", FROM GITES DE MINERAUX DE

  • Deposit

    MADAGASCAR, VOL. 1, 1966; TANANRIVE, MADAGASCAR,

  • Deposit

    PP. 187-216.

  • Deposit

    BESSAIRIE, HENRI, MAPS 43-52 FROM GITES DE MINERAUX DE

  • Deposit

    MADAGASCAR, VOL. 2, 1966, TANANARIVE, MADAGASCAR.

  • Deposit

    MURDOCK, T.G., MINERAL RESOURCES OF THE MALAGASY REPUBLIC,

  • Deposit

    BUMINES IC 8196, 1963, PP. 112-121.

General comments

Subject category Comment text
Deposit COST DATA FOR THIS PROPERTY WERE GATHERED UNDER BUREAU OF MINES CONTRACT J0225019, "THE DEVELOPMENT OF ENGINEERING AND COST DATA FOR FOREIGN GRAPHITE PROPERTIES"; THE CONTRACT WAS AWARDED TO ZELLARS-WILLIAMS, INC. IN SEPTEMBER 1982. ALL GRAPHITE MINES IN MADAGASCAR USE THE SAME MINING METHOD. SMALL OPEN PITS (GENERALLY 1 TO 5 IN NUMBER) ARE MINED BY FRONT-END LOADER OR BULLDOZER WITHOUT BLASTING. THE OVERBURDEN IS EITHER HAULED AWAY BY TRUCK OR, IF IT IS VERY THIN, IS WASHED WITH THE ORE. THE ORE IS EITHER TRUCKED TO A FIELD WASHER OR IS WASHED INTO A SLUICE BY A WATER GUN FOR GRAVITY FLOW TO THE FIELD WASHER. WATER GUNS ARE FED BY WATER PUMPED FROM A NEARBY RIVER. MILLING IS A TWO-STAGE PROCESS CARRIED OUT AT A "POSTES DE DEBOURBAGE" (FIELD WASHER) AND THEN AT A "RAFFINAGE" (REFINERY). AT THE FIELD WASHER, THE ORE IS FIRST SLURRIED USING A WATER GUN IF NOT ALREADY IN SLURRY FORM. A GRIZZLY IS THEN USED TO REMOVE STONES THAT ARE +5 MM IN SIZE. OCCASIONALLY THE ORE IS ALSO DESLIMED BY SCREEN- ING AT ABOUT 50 MESH. DIESEL FUEL OIL AND ALCOHOL-BASED FROTHERS ARE THEN ADDED PRIOR TO ROUGHER FLOTATION. THE ROUGHER CONCENTRATES VARY FROM 62 TO 67 PERCENT CARBON. TAILS ARE DISCHARGED BY GRAVITY INTO THE NEARBY RIVER. THE ROUGHER CONCENTRATE FLOWS BY GRAVITY TO THE REFINERY WHERE IT IS GROUND IN A BALL MILL, FLOATED, AND DRIED IN A ROTARY DRYER. THE DRIED CLEANER CONCENTRATE IS SIZED USING VIBRATING SCREENS AND BAGGED. ROD MILLS ARE USED AT SOME OPERATIONS INSTEAD OF BALL MILLS.

Reporter information

Type Date Name Affiliation Comment
Reporter 27-MAY-86 Z&W Inc U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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